12/1/2021 edit: swap is complete and functional
Has anyone added a Prado 120 sub tank in their GX470? I know there are aftermarket options available but the possibility of using the OEM tank is interesting and seemingly (possibly?) less expensive. Adding this sub tank increases the total fuel capacity by just over 2x, to 180L/ 47.5 gal.
This tank is an option in non-US markets and I have specifically been looking at the diagrams for the LHD gulf corporation market GRJ120L-GKAGKV which would also have a gasoline (petrol) engine (1GR/ 4.0l V6). It appears this conversion could be possible assuming the tank itself can be found, Partsouq lists it as unavailable so I am checking with a few other places.
Following diagrams are marked up with the parts related to the sub-tank/ parts that denote "sub tank" in their description:
You have the tank itself, the mounting for the tank, the plumbing for the tank filler, and plumbing between the sub and main tank. Electrically you have a different main tank pump, and a fuel level float in the sub tank. There is also a different wiring harness that I assume connects between the float and pump. The way the system functions I believe is the rear tank continuously pumps to the front tank with a supplyand return plumbed between the two which keeps the front tank full until the rear runs dry, the fuel float in the subtank would control this. I think the vehicles that come with this option also have a different fuel gauge which would read both senders and switch reading between the two, but this may not be easy to retrofit. I am basing this assumption on the following info:
Without retrofitting the fuel gauge it would just continuously read full until the sub tank is empty at which point the main tank would start drawing down.
Challenges:
-Obtaining the parts (tank itself)
-If there is any computer control/ if anything other than the float and pump control transfer between tanks.
-It appears that the main tank is also different (has additional tubes in/ out)
-Charcoal canisters and locations are different
Curious what people think about this. I know adding the sub tank has been done on other series but don't know if anyone has done it on a 120.
Has anyone added a Prado 120 sub tank in their GX470? I know there are aftermarket options available but the possibility of using the OEM tank is interesting and seemingly (possibly?) less expensive. Adding this sub tank increases the total fuel capacity by just over 2x, to 180L/ 47.5 gal.
This tank is an option in non-US markets and I have specifically been looking at the diagrams for the LHD gulf corporation market GRJ120L-GKAGKV which would also have a gasoline (petrol) engine (1GR/ 4.0l V6). It appears this conversion could be possible assuming the tank itself can be found, Partsouq lists it as unavailable so I am checking with a few other places.
Following diagrams are marked up with the parts related to the sub-tank/ parts that denote "sub tank" in their description:
FUEL TANK & TUBE | Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 | Parts Catalogs | PartSouq
If you are looking for FUEL TANK & TUBE Parts for Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 then we advise you to pay attention to the range of our spare parts catalog for Toyota!
partsouq.com
FUEL TANK & TUBE | Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 | Parts Catalogs | PartSouq
If you are looking for FUEL TANK & TUBE Parts for Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 then we advise you to pay attention to the range of our spare parts catalog for Toyota!
partsouq.com
SWITCH & RELAY & COMPUTER | Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 | Parts Catalogs | PartSouq
If you are looking for SWITCH & RELAY & COMPUTER Parts for Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 then we advise you to pay attention to the range of our spare parts catalog for Toyota!
partsouq.com
WIRING & CLAMP | Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 | Parts Catalogs | PartSouq
If you are looking for WIRING & CLAMP Parts for Toyota LAND CRUISER PRADO GRJ120L-GKAGKV 08.2004 - 08.2009 then we advise you to pay attention to the range of our spare parts catalog for Toyota!
partsouq.com
You have the tank itself, the mounting for the tank, the plumbing for the tank filler, and plumbing between the sub and main tank. Electrically you have a different main tank pump, and a fuel level float in the sub tank. There is also a different wiring harness that I assume connects between the float and pump. The way the system functions I believe is the rear tank continuously pumps to the front tank with a supply
Where's the Sub Tank Switch - Toyota Prado How To's, Technical Information & Reviews
Discuss any other areas about your 4x4 Toyota Prado 120.
www.pradopoint.com.au
Twin Fuel tank operation ?? - Toyota Prado How To's, Technical Information & Reviews
Discuss any other areas about your 4x4 Toyota Prado 120.
www.pradopoint.com.au
Without retrofitting the fuel gauge it would just continuously read full until the sub tank is empty at which point the main tank would start drawing down.
Challenges:
-Obtaining the parts (tank itself)
-If there is any computer control/ if anything other than the float and pump control transfer between tanks.
-It appears that the main tank is also different (has additional tubes in/ out)
-Charcoal canisters and locations are different
Curious what people think about this. I know adding the sub tank has been done on other series but don't know if anyone has done it on a 120.
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